What happened
During cruise flight, the helicopter was operating at an altitude of approximately 800 feet over a football stadium when the engine suddenly lost power. Recognizing the emergency, the pilot immediately initiated an autorotation. To ensure safety during the descent, the pilot applied collective pitch early in the maneuver to maintain sufficient clearance from nearby overhead wires.
The helicopter subsequently landed hard on the ground. The impact caused significant structural damage to the aircraft, specifically affecting the belly and the transmission mounts.
The investigation
Following the accident, investigators examined the engine to determine the root cause of the power loss. The inspection revealed that the compressor discharge line was loose at the fuel control unit. This mechanical failure prevented the engine from maintaining proper operation during the cruise phase.